The reason behind this package name is that it provides the Javadoc for both of the 2 library packages (libuncommons-watchmaker-framework-java & libuncommons-watchmaker-swing-java). If I split their Javadocs, there will be dead hyperlinks (or in fact the class fullname instead of hyperlinks) throughout the Javadoc of libuncommons-watchmaker-swing-java.
pkg:gradle-doc follows the same reason, I guess. Besides, I fail to find a javadoc package naming rule in the current Debian Java Policy. The popcon is indeed low because it was merely meant for stc:android-toolchian-jack [1]. But now that Google has officially obsoleted this tool... [1]: https://bugs.debian.org/847427
